pneumatic seal manufacturer in China

Pneumatic Seal Manufacturer in China: Sourcing Guide for Cylinder and Valve Seals

Quick Answer: CORASEALS is a China-based industrial seal supplier that provides pneumatic seals, pneumatic cylinder seal kits, rod seals, piston seals, wiper seals, wear rings, U-cup seals, V-packing, and custom pneumatic sealing parts. Send the cylinder bore, rod diameter, groove dimensions, operating pressure, temperature, air quality, seal profile, and required quantity for a quote.

Pneumatic cylinders operate fast. Many air circuits run with light oil mist or dry air. Seal friction must be low, and wear life must be predictable. CORASEALS supports buyers who need a pneumatic seal manufacturer in China for standard profiles and custom sizes.

Pneumatic Seal Profiles Supplied by CORASEALS

Standard profiles cover most pneumatic cylinder and air valve requirements. We supply the following profiles as individual seals or as part of a seal kit.

Piston seals for cylinder pistons
Rod seals for cylinder rods
Wiper seals and scraper seals for rod contamination
Buffer seals for end stroke pressure spikes
Wear rings and guide rings for piston and rod guidance
U-cup seals for pneumatic piston and rod sealing
V-packing for adjustable sealing stacks
Compact seals for short groove designs
O-rings for pneumatic valve, fitting, and static gland sealing
Pneumatic cylinder seal kits

Do not select a seal by type code alone. Codes such as UN, UHS, or KDAS may not match across different catalogs. Confirm the groove shape, ID, OD, width, and installed direction before ordering.

Material Selection for Pneumatic Seals

Air quality changes the material choice. A pneumatic seal for dry air is not the same as a seal for oil mist air. Use the table below as a general selection guide.

Material	Common Pneumatic Use	Check Before Ordering
NBR	Standard air cylinders with mineral oil mist	Avoid if ozone, high heat, or aggressive chemicals are present
FKM	High temperature air, chemical exposure, some aggressive gases	Higher cost, check friction and low temperature limit
EPDM	Dry air, clean air, water-based fluids	Not for most mineral oil mist or petroleum lubricants
Silicone	Low temperature clean air, food and medical air circuits	Low wear resistance, not for high load or high cycle
Polyurethane or TPU	High cycle cylinders where wear resistance is important	Check humidity and upper temperature limits
Filled PTFE	Low friction, dry running, low lubrication requirements	Requires correct groove and energizer design

Material hardness is selected with the seal profile, pressure, and groove fit. Do not change hardness without checking the cylinder design.

Information Needed for a Pneumatic Seal Quote

For standard or custom pneumatic seals, send the following data. This reduces errors and shortens quote time.

Cylinder bore diameter and rod diameter
Groove ID, OD, width, and depth
Seal profile, drawing number, or sample photo
Operating pressure range
Operating temperature range
Air quality, including oil mist, dry air, moisture, or chemicals
Cylinder speed or cycle rate
Required material and Shore A hardness
Quantity per size

For inch cylinders, state both inch and metric sizes when possible. A 2 inch bore cylinder and a 50 mm bore cylinder are not the same. Mixing unit systems creates wrong groove fits and leak paths.

Sourcing from a Pneumatic Seal Manufacturer in China

When you compare pneumatic seal manufacturers in China, ask for the profile drawing before quoting. A clear drawing shows the lip shape, groove fit, and installed orientation. Ask the supplier to confirm the seal material and hardness against the operating conditions.

Check the rod surface finish, the bore surface finish, the chamfer, and the rod runout. A good seal can fail early if the metal surfaces are not within the required range. Send surface condition details if the cylinder has scoring, rust, or heavy wear.

For batch orders, request traceability. Ask for a material certificate and inspection report where the application requires it. CORASEALS can support material, size, and profile checks before shipment.

Custom Pneumatic Seals and Seal Kits from China

CORASEALS can source custom pneumatic seals to drawing or sample. Custom profiles include non standard U-cups, compact piston seals, rod wipers, and complete pneumatic cylinder seal kits for repair programs.

Send us the cylinder bore, rod diameter, groove dimensions, operating pressure, temperature, air quality, seal profile, and required quantity. If you have a drawing or sample photo, include it. We will review the seal profile and recommend a part for confirmation.

Frequently Asked Questions

What pneumatic seals does CORASEALS supply?

CORASEALS supplies pneumatic piston seals, rod seals, wiper seals, scraper seals, buffer seals, wear rings, guide rings, U-cup seals, V-packing, compact seals, O-rings, and pneumatic cylinder seal kits.

Can CORASEALS supply custom pneumatic seals from China?

Yes. Send the groove dimensions, seal profile, material, hardness, and operating conditions. If a drawing or sample is available, include it for review.

What is the difference between a rod seal and a piston seal in a pneumatic cylinder?

A rod seal seals the dynamic interface between the rod and the head. A piston seal seals the dynamic interface between the piston and the bore. The lip direction and groove position are different.

Which material is best for pneumatic cylinder seals?

No single material fits all pneumatic cylinders. NBR works for many oil mist air circuits. FKM covers higher heat or chemical exposure. EPDM is used for dry air or clean air systems. Confirm air quality and temperature before choosing.

What information should I send for a pneumatic seal kit quote?

Send the cylinder bore, rod diameter, groove dimensions, cylinder model if available, operating pressure, temperature, air quality, seal profile, and required quantity. A photo of the old seal kit also helps.